Inimical is a word that can define our mood in some sense. An inimical act can make mood change to extreme. What is inimical?
Jaunty : he was so jaunty that he enlightened all of us.
Hospitable: The hospitable environment here changed my mood to that of euphoria
Comic: When I saw the comic act I start rolling down the bed
Antagonizing: His antagonizing acts were beyond my control